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Aluminum-containing ferroalloy for steelmaking deoxidizing

An aluminum-iron alloy, mass percentage technology, applied in the field of aluminum-containing iron alloy, can solve problems such as fragmentation, unusability, pulverization, etc.

Inactive Publication Date: 2008-08-13
谢应凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aluminum-based composite deoxidizer will disintegrate or even pulverize during storage, so it cannot be used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] An aluminum-tungsten-iron alloy steelmaking deoxidizer used for steelmaking deoxidation without pulverization is prepared.

[0012] Prepare materials according to the following ingredient ratio: metal aluminum 60kg, iron tungsten (FeW 80-B , containing W78%) 3kg. Medium carbon ferromanganese (FeMn 78 C 2.0 , containing Mn80%) 7kg. Scrap steel 30kg. These raw materials are put into a 200KV.A intermediate frequency electric furnace and melted to form an aluminum-tungsten-iron alloy with the following composition.

[0013] Chemical composition of aluminum-tungsten-iron alloy (mass%)

[0014] the element

[0015] 210T converter is used to produce SS400 thin slab. Every furnace uses 700kg of the product of this embodiment to make the final deoxidation of the molten steel, and the oxygen content in the steel decreases by 10ppm than the former aluminum-iron (FeAl55) final deoxidation. This product has been stored for 13 months without pulverization.

Embodiment 2

[0017] An aluminum-molybdenum-iron alloy steelmaking deoxidizer for steelmaking deoxidation is prepared.

[0018] Raw materials are prepared according to the following ingredient ratio: metal aluminum 70kg, ferromolybdenum (FeMo 70 , containing Mo68%) 5kg. Magnesium ingot 3kg. Scrap steel 25kg. These raw materials are put into a 200KV.A intermediate frequency electric furnace and melted to form an aluminum-molybdenum-iron alloy with the following composition.

[0019] Chemical composition of aluminum-molybdenum-iron alloy (mass%)

[0020] the element

[0021] The aluminum-molybdenum-iron alloy prepared according to the present embodiment was placed for 10 months, though it passed through high temperature and humid summer, but no pulverization occurred.

Embodiment 3

[0023] Preparation of aluminum-tungsten-molybdenum-iron alloy steelmaking deoxidizer and molybdenum alloying supplement for steelmaking deoxidation.

[0024] Prepare materials according to the following ingredient ratio: metal aluminum 50kg, iron tungsten (FeW 80-B , containing W 79%) 3kg. Ferromolybdenum (FeMo 70 , containing Mo68%) 30kg, calcium silicon (Ca28Si60, containing 28% calcium, containing 58% silicon) 20kg. These raw materials are put into a 200KV.A intermediate frequency electric furnace and melted to form an aluminum-tungsten-molybdenum-iron alloy with the following composition.

[0025] Al-tungsten-molybdenum-iron alloy chemical composition (mass%)

[0026] the element

Al

W

Mo

Ca

Si

Fe

C

S

P

％

47.3

2.3

19.3

5.1

11.8

30.7

0.5

0.04

0.04

[0027] Production of 15Mn by 210T Converter 2 steel. Add 600kg of the product of this embodiment i...

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PUM

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Abstract

The invention discloses a deoxidizing agent for steelmaking, which contains 40% to 70% of aluminum, 0.5% to 20% of tungsten and / or molybdenum, the remaining are iron and unavoidable impurity. The alloy solves the problem of easy pulverization of current aluminum matrix complex deoxidizer.

Description

technical field [0001] The invention relates to a steelmaking deoxidizer, in particular to an aluminum-containing ferroalloy used for steelmaking deoxidation. Background technique [0002] In the process of steelmaking, there is a certain amount of oxygen in molten steel. In order to produce qualified steel and obtain steel with good properties, some elements with strong oxygen binding force must be added, such as: Al, Mg, Ca, Si, Mn, etc. Oxygen is removed. Aluminum is the main deoxidizing element. However, due to its light specific gravity, low ignition point and large burning loss, the utilization rate is only about 30%. In order to solve the problems existing in deoxidation with aluminum, composite alloys of aluminum have been developed, such as Al-Mn-Fe, Si-Al-Fe, etc., which solve the problem that the specific gravity of aluminum is small. However, the aluminum-based composite deoxidizer will disintegrate or even pulverize by itself during storage, so it cannot be u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C22C21/00C22C30/00
Inventor 谢应凯
Owner 谢应凯
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